guloader | c90f02f4c4f58772131c5fc1b8cc8acc647005189e1abd87ecae379a41b0eac8

Analysis

max time kernel
150s
max time network
155s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 20:45

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General

Target

tmp6x00xzqq.exe
Size

701KB
MD5

cd46396fa20831c4ec0acea6534d020f
SHA1

1736c61d635cc61d8e9ec6b0dd15ddf814657fc5
SHA256

c90f02f4c4f58772131c5fc1b8cc8acc647005189e1abd87ecae379a41b0eac8
SHA512

b40e2fe2faab4a4faf3c6e82cd778868fb275e41b55f40a6f566eecab23aac42e0956b261b124c47849bcc8d6a4809192c5ec21e301d8d513b9391571b7cdc91
SSDEEP

12288:Cvp1DrAkngRmfxs7ZsGYAG5utPHH9oTHhwOR6bu:enDrA/mfWZsGY7+0ho

Score

10^/10

guloader downloader

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Loads dropped DLL 1 IoCs

Processes:

tmp6x00xzqq.exe

pid process

2256 tmp6x00xzqq.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

tmp6x00xzqq.exetmp6x00xzqq.exe

pid process

2256 tmp6x00xzqq.exe
2808 tmp6x00xzqq.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

tmp6x00xzqq.exe

description pid process target process

PID 2256 set thread context of 2808 2256 tmp6x00xzqq.exe tmp6x00xzqq.exe

pid	process
2256	tmp6x00xzqq.exe

pid	process
2256	tmp6x00xzqq.exe
2808	tmp6x00xzqq.exe

description	pid	process	target process
PID 2256 set thread context of 2808	2256	tmp6x00xzqq.exe	tmp6x00xzqq.exe

Drops file in Windows directory 2 IoCs

Processes:

tmp6x00xzqq.exe

description	ioc	process
File opened for modification	C:\Windows\resources\0409\stanse\selenitic.imp	tmp6x00xzqq.exe
File opened for modification	C:\Windows\Fonts\humanhood.krs	tmp6x00xzqq.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

tmp6x00xzqq.exe

pid process

2256 tmp6x00xzqq.exe

pid	process
2256	tmp6x00xzqq.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

tmp6x00xzqq.exe

description	pid	process	target process
PID 2256 wrote to memory of 2808	2256	tmp6x00xzqq.exe	tmp6x00xzqq.exe
PID 2256 wrote to memory of 2808	2256	tmp6x00xzqq.exe	tmp6x00xzqq.exe
PID 2256 wrote to memory of 2808	2256	tmp6x00xzqq.exe	tmp6x00xzqq.exe
PID 2256 wrote to memory of 2808	2256	tmp6x00xzqq.exe	tmp6x00xzqq.exe
PID 2256 wrote to memory of 2808	2256	tmp6x00xzqq.exe	tmp6x00xzqq.exe
PID 2256 wrote to memory of 2808	2256	tmp6x00xzqq.exe	tmp6x00xzqq.exe

C:\Users\Admin\AppData\Local\Temp\tmp6x00xzqq.exe
"C:\Users\Admin\AppData\Local\Temp\tmp6x00xzqq.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2256

C:\Users\Admin\AppData\Local\Temp\tmp6x00xzqq.exe
"C:\Users\Admin\AppData\Local\Temp\tmp6x00xzqq.exe"
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:2808

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nstA0E2.tmp\System.dll
Filesize
11KB

MD5
0ff2d70cfdc8095ea99ca2dabbec3cd7

SHA1
10c51496d37cecd0e8a503a5a9bb2329d9b38116

SHA256
982c5fb7ada7d8c9bc3e419d1c35da6f05bc5dd845940c179af3a33d00a36a8b

SHA512
cb5fc0b3194f469b833c2c9abf493fcec5251e8609881b7f5e095b9bd09ed468168e95dda0ba415a7d8d6b7f0dee735467c0ed8e52b223eb5359986891ba6e2e

Download Submit
memory/2256-10-0x0000000002830000-0x00000000048E9000-memory.dmp

Filesize
32.7MB

Download
memory/2256-11-0x0000000002830000-0x00000000048E9000-memory.dmp

Filesize
32.7MB

Download
memory/2256-12-0x0000000077241000-0x0000000077342000-memory.dmp

Filesize
1.0MB

Download
memory/2256-13-0x0000000077240000-0x00000000773E9000-memory.dmp

Filesize
1.7MB

Download
memory/2256-21-0x0000000002830000-0x00000000048E9000-memory.dmp

Filesize
32.7MB

Download
memory/2808-14-0x0000000077240000-0x00000000773E9000-memory.dmp

Filesize
1.7MB

Download
memory/2808-15-0x00000000004E0000-0x0000000001542000-memory.dmp

Filesize
16.4MB

Download